Q.

The oxidation state of iron change to __ in the process of formation of rust.

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a

Iron (I)

b

Iron (III)

c

Iron (II)

d

Iron (IV)

answer is C.

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Detailed Solution

4Fe+3O2+x. H2O→2Fe2O3. xH2O

Iron (II) is changed to Iron(III) oxide or ferric oxide, where the iron atom exhibits an oxidation state of +3.

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